antigen-antibody reactionmedical dictionary

The phenomenon, occurring in vitro or in vivo, of antibody combining with antigen of the type that stimulated the formation of the antibody, thereby resulting in agglutination, precipitation, complement fixation, greater susceptibility to ingestion and destruction by phagocytes, or neutralization of exotoxin.

See: skin test.

Acronym: AAR

(05 Mar 2000)